TW201400267A - Clamping mechanism of two-plate injection molding machine and two-plate injection molding machine - Google Patents

Abstract

A clamping device for a two-platen injection molding machine, includes a movable mold platen, a stationary mold platen, and a tie bar connected therebetween, with the movable mold platen being movable along the tie bar. The clamping device further includes a connecting structure that is used to detachably connect an elongating tie bar to an end of the tie bar. The tie bar can be elongated as desired and re-machining the whole tie bar is dispensed with, therefore the tie bar can be elongated conveniently, the productivity is increased and the product cost is lowered.

Description

Two-plate injection molding machine clamping mechanism and two-plate injection molding machine

The invention relates to a two-plate injection molding machine clamping mechanism and a two-plate injection molding machine comprising the same.

With the development of the plastics industry, the requirements for plastic products are getting higher and higher, and the traditional toggle-type injection molding machines have been difficult to meet the requirements. The two-plate injection molding machine has been widely used due to its simple structure and low cost. The clamping mechanism used in the two-plate injection molding machine generally comprises a moving plate, a fixed plate and a tie rod connected between the movable plate and the fixed plate and for moving the template to move thereon. The working principle of the clamping mechanism of the two-plate injection molding machine is to move the movable template by the mold-moving cylinder. When the mold is fitted, the four clamping cylinders are used to pull the moving template to press the mold, and the pulling force of the clamping cylinder directly overcomes the clamping mechanism. Elastic deformation produces a clamping force.

In the current two-plate injection molding machine clamping mechanism, the role of the tie rod is mainly to connect the fixed template and the movable template, and to provide the pulling force required for the clamping mechanism during injection molding. At the same time, when the template is opened, the drawbar guides the movement of the movable template, and the positioning hole of the movable template can be used to support the drawbar to ensure the positional accuracy of the drawbar.

Many of today's molds are complex in structure, and inserts are placed and have multiple parting surfaces, which requires a longer mold opening stroke (ie, the spacing between the fixed and fixed stencils needs to be increased). In addition, the mold replacement produced by the injection molding machine is also more and more frequent, which requires the adjustment of the clamping mechanism of the injection molding machine to be fast and simple. Traditional when it is necessary to replace a large mold or require a longer mold opening stroke This is done by removing the standard design of the drawbar and reworking the same number of tie rods that meet the requirements.

It can be seen that in the existing two-plate injection molding machine clamping mechanism, if the customer has custom requirements, the tie rod must be reworked according to the customer's customized requirements. The standard lever is then removed and the reworked lever is assembled to the clamping mechanism. Whether it is the processing or disassembly and assembly of the tie rods, it is quite time-consuming and laborious, directly affecting the production efficiency of the entire two-plate injection molding machine, resulting in a longer production cycle and an increase in production costs.

The invention aims to overcome the deficiencies in the prior art, and proposes a new two-plate type injection molding machine clamping mechanism. In the clamping mechanism, the connection of the tie rod is reliable, and the processing and assembly are convenient, thereby improving production efficiency and shortening the product production cycle. . That is, the present invention solves the problems of the prior art by providing a clamping mechanism that can lengthen the tie rod according to customer customization without reworking the integral tie rod.

In an aspect of the invention, a two-plate injection molding machine clamping mechanism is provided, the clamping mechanism comprising a movable template, a fixed template and a tie rod connected between the movable template and the fixed template, the movable template Capable of moving over the pull rod, wherein the clamping mechanism further includes a connection structure for detachably connecting the elongated guide post to the end of the pull rod.

In the above aspect of the invention, the mold clamping mechanism may further include an elongated guide post.

In any of the above aspects of the invention, the connecting structure may include: a positioning protrusion formed at an end surface of the end of the tie rod; and a shape And a positioning hole on the end surface of the elongated guide post that cooperates with the positioning protrusion.

In any of the above aspects of the invention, the connecting structure may further include: a threaded hole formed on an end surface of the positioning protrusion; a connecting rod having one end of the connecting rod threadedly engaged with the threaded hole, and the other end An axial through hole extending through the elongated guide post; and a fastener that secures the elongated guide post and the tie rod together at the other end.

In any of the above aspects of the invention, the connection structure may further include: a positioning hole formed on an end surface of the end of the tie rod; and a positioning hole formed in an end surface of the elongated guide post Fit the positioning bumps.

In any of the above aspects of the invention, the connecting structure may further include: a threaded hole formed in a bottom surface of the positioning hole; a connecting rod having one end of the connecting rod threadedly engaged with the threaded hole and the other end extending An axial through hole in the elongated guide post; and a fastener that fastens the elongated guide post and the tie rod together at the other end.

In any of the above aspects of the invention, the connecting structure may further include a nut that further fastens the one end of the connecting rod in the threaded hole.

In any of the above aspects of the invention, a threaded post may be formed on an end surface of the positioning projection, and a threaded hole that is threadedly engaged with the threaded post may be formed in a bottom surface of the positioning hole.

In any of the above aspects of the invention, a threaded hole may be formed in a bottom surface of the positioning hole, and a positioning convex on an end surface of the elongated guide post A threaded post that is threadedly engaged with the threaded bore can be formed.

In any of the above aspects, the connecting structure may further include at least one positioning screw, and the at least one positioning screw and at least one of the outer circumferential surfaces of the elongated guide post corresponding to the positioning hole A radially threaded threaded bore engages to position the locating projection.

In any of the above aspects of the present invention, at least one radially through threaded hole may be formed on an outer peripheral surface of the end of the tie rod corresponding to the positioning hole, and a screw may be engaged with the threaded hole to The positioning protrusion is further positioned.

In any of the above aspects of the invention, the elongated pull rod may comprise at least two segments that are separable from each other.

In any of the above aspects of the invention, the end and the elongated guide post form a guide segment of the drawbar that is not subjected to tension but is only used for guiding.

In any of the above aspects of the invention, the tie rod may further comprise a threaded section that is subjected to tensile forces.

In any of the above aspects of the invention, the number of the tie rods may be four, and the movable template is provided with the same number of positioning holes for supporting the pull rod as the number of the pull rods. Of course, the number of tie rods may also be more than four or less than four, and the number of positioning holes on the movable platen may be correspondingly more than four or less than four.

In another aspect of the invention, a two-plate injection molding machine is provided, the two-plate injection molding machine comprising a two-plate injection molding machine clamping mechanism according to any of the above aspects.

In still another aspect of the present invention, a two-plate injection molding machine is provided, The two-plate injection molding machine includes a two-plate injection molding machine clamping mechanism according to any of the above aspects, wherein the elongated guide post includes a plurality of elongated guide columns of different lengths.

According to the second plate type injection molding machine clamping mechanism according to the first aspect of the present invention, since the clamping mechanism is provided with a connecting structure for connecting the elongated guide post to the tie rod, when a longer tie rod is required, it is not necessary to rework the new tie rod. There is no need to remove the tie rod, just remove the extended guide post and replace the longer extension guide post. Therefore, compared with the conventional mold clamping mechanism, the tie rod of the clamping mechanism of the present invention is easy to assemble, saves time and labor, thereby improving production efficiency and reducing production cost.

According to the other aspect of the invention, the two-plate type injection molding machine clamping mechanism can extend the drawing rod according to the custom requirements by setting the connecting structure on the pulling rod and the elongated guiding column, thereby reducing the production cost and shortening the product. Supply cycle.

According to the two-plate type injection molding machine of the present invention, since the clamping mechanism includes the tie rod and a plurality of elongated guide columns of different lengths, the drawbar can be lengthened according to the custom requirements of the customer, and the entire drawbar is not required to be reworked, thereby reducing the production cost and shortening the supply of the product. cycle. Therefore, the same technical effects as described above can be obtained as well.

Other aspects, features, and advantages of the present invention will be apparent from the following description of the appended claims.

1‧‧‧ lever

2‧‧‧Extended guide column

3‧‧‧ Connecting rod

4‧‧‧ nuts

5-7‧‧‧fasteners

8‧‧‧Opening nut

9‧‧‧ moving template

10‧‧‧steering section

15,102', 202‧‧‧ threaded holes

101,201’‧‧‧ Positioning bulge

101’, 201‧‧‧ positioning holes

102,202’‧‧‧ threaded column

The invention will be described in detail below based on the drawings, in which: Figure 1 is a two-plate injection molding machine lock according to an embodiment of the present invention. 2 is a perspective view of a part of a mold clamping mechanism of a two-plate injection molding machine according to an embodiment of the present invention; and FIG. 3 is an extension of a clamping mechanism of a two-plate injection molding machine according to an embodiment of the present invention. FIG. 4 is a cross-sectional view showing an example of a connection structure of a lengthening tie rod of a two-plate type injection molding machine, according to another embodiment of the present invention; FIG. 5 is a still further embodiment according to the present invention. A cross-sectional view of an example of a connection structure of a lengthened tie rod of a two-plate type injection molding machine, and a cross-sectional view of an example of a connection structure of a lengthened tie rod of a two-plate type injection molding machine, according to still another embodiment of the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Throughout the drawings, the same reference numerals will be given to the same elements.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a part of a mold clamping mechanism of a two-plate type injection molding machine to which the present invention is applied, and Fig. 2 is a perspective view showing a tie rod and an elongated guide post according to the present invention, and Fig. 3 is a cross-sectional view. As shown in the figure, the two-plate injection molding machine clamping mechanism generally includes a movable die plate 9, a fixed template and a tie rod 1. The template is not shown in the figure. The movable die plate 9 is provided at its four corners with four positioning holes that cooperate with the tie rod 1 so that the movable die plate 9 moves on the tie bar 1. At the same time, the movable die plate 9 supports the tie rod 1 by means of its positioning hole to prevent the tie rod 1 from sagging. Only one tie rod 1 and four positioning holes are schematically shown in Fig. 1. However, in the clamping mechanism shown in Fig. 1, there are actually four identical tie rods 1. The number of tie rods 1 is the same as the number of positioning holes on the movable die plate 9. Although the moving template 9 is shown in FIG. There are four locating holes (four tie rods 1 are required accordingly), but other numbers of locating holes and tie rods 1 can be used, such as fewer than four or more than four locating holes and tie rods 1.

Figure 1 does not show a template. The fixed plate is connected to the tie rod 1 at the left end of the tie rod 1 shown in FIG. The stationary die plate may be provided with a clamping device (not shown) for applying a pulling force to the tie rod 1, such as a clamping cylinder or the like. Further, the movable die plate 9 is provided with a die shifting device (not shown) for urging the movement of the movable die plate 9, such as a shifting cylinder or the like. An opening and closing nut 8 is provided at a position near the end of the tie rod 1. The opening and closing nut 8 cooperates with a thread formed on the threaded section of the tie rod 1 for providing a locking force during clamping. In operation, the opening and closing nut 8 is locked, and then the die-moving device (for example, the mold-moving cylinder) is driven to move the movable die plate 9 on the tie bar 1 toward the fixed plate. After the mold (not shown) is fitted, the mold is clamped. A device, such as a clamping cylinder, applies a pushing force to the movable die plate 9 by means of the tie rod 1 and the opening and closing nut 8, thereby locking the mold.

The movable template 9, the fixed plate, the opening and closing nut 8, the mold shifting device and the clamping device are well known in the art, and the specific structure thereof will not be described in detail herein.

Further, in the present specification, one end of the above-described tie rod 1 to which a fixed template is attached is referred to as a front end, and the other end is referred to as an end. As is known to those skilled in the art, in the injection molding machine clamping mechanism shown in Fig. 1, the tie rod 1 can often be divided into two parts, namely a threaded section that is subjected to tensile force and a guide section that is not subjected to tensile force but only for guiding. (here indicated by the symbol 10). The threaded section is used to withstand tension during the clamping process, and the guiding section is used to guide the movable die plate 9 during the mold opening process and is supported by the movable die plate 9 to prevent the drawbar 1 from sagging.

As described in the background art, the length of the tie rod of the existing two-plate type injection molding machine clamping mechanism cannot be lengthened. If the customer requires a longer tie rod, the rod must be reworked according to the customer's custom requirements, the original rod is removed from the clamping mechanism, and the reworked rod is mounted on the clamping mechanism to meet the customer's customization requirements. . However, such rework, dismantling and installation are time-consuming and laborious, which not only affects production efficiency, but also leads to longer production cycles and increased production costs.

The inventors of the present invention have found that for the drawbar of the two-plate type injection molding machine, only the threaded section connected to the movable die plate and the fixed die plate is subjected to tensile force, and the end of the drawbar is not subjected to any tensile force, and is only used for guiding.

Therefore, as shown in FIGS. 1 to 3, the two-plate type injection molding machine according to the present invention includes, in addition to the above-described components, an elongated guide post 2 for lengthening the length of the tie rod 1. The elongated guide post 2 is connected to the end of the tie rod 1 by a connecting structure. In this way, various lengths of the elongated guide post 2 can be connected to the tie rod 1 according to the customization requirements of the customer, thereby obtaining the extension rods 1 of different lengths. The elongated guide post 2 and the tie rod 1 should have a uniform outer diameter dimension.

In the embodiment shown in FIGS. 1 to 3, a positioning projection 101 is formed in the end surface of the end of the tie rod 1. A positioning hole 201 that engages with the positioning projection 101 of the tie rod 1 is formed on the end surface of the elongated guide post 2 opposite to the end surface of the end of the tie rod 1. The positioning projections 101 and the positioning holes 201 may have a cylindrical shape, a polygonal shape, a tapered shape, or other suitable shape. Since the cylindrical shape is easy to process and assemble, the positioning projection 101 and the positioning hole 201 preferably have a cylindrical shape. The positioning protrusion 101 may further have a frustoconical shape that tapers toward the end. At this time, the positioning hole 201 needs to have a frustoconical shape complementary to the positioning protrusion 101. shape. The size of the positioning protrusion 101 and the positioning hole 201 should satisfy the positioning requirements of the tie rod 1 and the elongated guide post 2, that is, the cooperation of the positioning protrusion 101 and the positioning hole 201 can satisfy their concentricity requirements. Further, it is preferable that the longitudinal direction of the positioning projection 101 (the longitudinal axis direction of the tie rod 1 in Fig. 1) is shorter than the longitudinal length of the positioning hole 201 so as to lengthen the close contact of the guide post 2 with the end surface of the tie rod 1 when connected. The elongated guide post 2 and the tie rod 1 can be made of the same metal material. Of course, it can also be made of different metal materials or other materials such as plastics.

In addition, the cooperation between the positioning protrusion 101 and the positioning hole 201 should ensure that the elongated guide post 2 can be detached from the pull rod 1 when necessary, that is, the cooperation between the positioning protrusion 101 and the positioning hole 201 is a detachable mating connection. .

As shown in FIG. 3, a threaded hole for connecting the elongated connecting rod 3 may be formed in the end face of the positioning projection 101. In this case, it is preferable that the longitudinal length of the positioning hole 201 is longer than the longitudinal length of the positioning projection 101, for example, longer than the width of at least one of the nuts 4. Thus, when the connecting rod 3 having the threaded end is inserted into the thread, the connecting rod 3 can be further fastened in the threaded hole of the tie rod 1 by the nut 4. As shown in FIG. 3, the elongated guide post 2 also has a through axial through hole so that the other end of the connecting rod 3 penetrates through the axial through hole. The diameter of the axial through hole should match the diameter of the connecting rod. In FIG. 3, the left end of the axial through hole may form a groove having an enlarged diameter, and the other end of the connecting rod 3 further has a threaded hole, so that the gasket 5, the spring washer 6 and the like may be utilized in the groove. The screw 7 fastens the connecting rod 3 to the elongated guide post, thereby connecting the elongated guide post 2 and the pull rod 1 as a whole, as shown in FIG. The screw 7 is preferably a hexagon socket screw, but other suitable screws may be used.

Alternatively, the other end of the connecting rod 3 may have an external thread. In this case, the axial through hole can be directly penetrated without having to form a groove having an enlarged diameter. Thus, the connecting rod 3 can be fastened to the elongated guide post 2 by means of a spacer and a nut to connect the elongated guide post 2 and the tie rod 1 as a single unit.

Further, the elongated guide post 2 may have at least one radially through threaded hole (not shown) on its outer peripheral surface corresponding to the positioning hole 201. Thus, the positioning projections 101 can be further positioned by screws, thereby further increasing the connection rigidity of the elongated guide post 2 and the tie rod 1.

The process of installing the elongated guide post 2 will be described below by taking the clamping mechanism shown in FIGS. 1 to 3 as an example.

First, the positioning projection 101 is machined at the end of the tie rod 1, and a threaded hole is machined in the end surface of the positioning projection 101. Next, the threaded connecting rod 3 at one end is threadedly engaged in the threaded hole of the positioning projection 101. Preferably, the connecting rod 3 is further locked by the nut 4 to prevent the connecting rod 3 from being loosened. Again, the extended guide post 2 is sleeved on the connecting rod 3, and the positioning protrusion 101 of the pull rod 1 is fitted in the positioning hole 201 of the elongated guide post 2 to achieve positioning. Next, the connecting rod 3 is fastened to the elongated guide post 2 by the spacer 5, the screw 7, and the spring washer 6, so that the extended guide post 2 and the tie rod 1 are fastened to be integrated. The extension of the guide post 2 and the end of the tie rod 1 constitute a guide section that only guides the movable die plate 9 without being subjected to tensile force. As shown in Fig. 3, the threaded portion of the tie rod 1 constitutes a threaded section of the tie rod 1 that is subjected to tension.

For the embodiment of the invention shown in Fig. 1, if a longer tie rod 1 is required (for example, the customer needs to increase the interval between the movable template 9 and the fixed template, so that it is necessary to increase the stroke of the movable template 9, it is necessary to further Long tie rod) The elongated guide post 2 can be removed in the reverse order of the above process, and then another extended guide post 2 meeting the length requirement can be selected and reinstalled on the pull rod 1 according to the above process, without removing the original pull rod 1 No need to machine and install new levers. Therefore, compared with the conventional clamping mechanism, the clamping mechanism of the present invention only needs to install additional parts, saving time and labor, thereby improving production efficiency, shortening the production cycle, and significantly reducing the production cost.

In addition, since the elongated guide post 2 is only used for guiding without any tensile force, it can be made of a material that is cheaper than the tie rod 1, thus further reducing production and processing costs.

Another embodiment of the present invention will be described below with reference to FIG. The embodiment shown in Fig. 4 differs from the embodiment shown in Figs. 1 to 3 in that the positioning positions of the positioning projections and the positioning holes are changed. As shown in FIG. 4, no positioning protrusion is formed in the end surface of the end of the tie rod 1, but a positioning hole 101' is formed, and accordingly, no positioning is formed on the end surface of the elongated guide post 2 opposite to the end surface of the end of the tie rod 1. Instead of the holes, a positioning projection 201' is formed. By engaging the positioning projection 201' in the positioning hole 101', the elongated guide post 2 is positioned on the tie rod 1 and the concentricity of the two is ensured. Also preferably, the longitudinal length of the positioning hole 101' is longer than the length of the positioning projection 201' by at least one nut, so that the connecting rod 3 is further fastened to the threaded hole formed in the bottom surface of the positioning hole 101' using the nut 4. . Other aspects of the embodiment shown in FIG. 4 are similar to FIG. 1 and will not be described in detail herein.

Figure 5 illustrates another embodiment of the mold clamping mechanism of the present invention. In this embodiment, the end of the tie rod 1 is formed with a positioning projection 101, and a threaded post 102 is formed on the end surface of the positioning projection 101. Correspondingly, the guide post 2 is lengthened A positioning hole 202 is formed on an end surface opposite to the end of the tie rod 1, and a threaded hole 202 is formed on the bottom surface of the positioning hole 202 in threaded engagement with the threaded post 102 on the positioning projection 101. The positioning protrusions 101 and the positioning holes 201 are used to position the elongated guide post 2 on the tie rod 1 to ensure the concentricity of the extension guide post 2 and the tie rod 1. As described above, when the elongated guide post 2 is assembled on the tie rod 1, the extension guide post 2 and the end of the tie rod 1 constitute a guide section which is not subjected to tensile force and is only used to guide the movable die plate 9. The other part of the tie rod 1 constitutes a threaded section that is subjected to tension.

In the embodiment shown in FIG. 5, in order to further strengthen the connection rigidity between the elongated guide post 2 and the tie rod 1, at least one radially through threaded hole may be formed at the outer circumference of the extended guide post 2 corresponding to the positioning hole 201 thereof. 15. The positioning projection 101 is then positioned by screwing into the threaded hole to further enhance the connection rigidity between the elongated guide post 2 and the tie rod 1. The same effects as those of the embodiment shown in Figs. 1 to 3 can be obtained by the embodiment shown in Fig. 5.

Figure 6 shows another embodiment of the invention. The embodiment shown in Fig. 6 differs from the embodiment shown in Fig. 5 in that the positions of the positioning projections and the positioning holes are changed. As shown in Fig. 6, the positioning projection 201' is formed on the end surface of the elongated guide post 2 opposite to the end of the tie rod 1, and the positioning hole 101' is formed on the end surface of the end of the tie rod 1. The positioning projection 201' of the elongated guide post 2 is fitted in the positioning hole 101' of the tie rod 1, thereby positioning the elongated guide post 2 on the tie rod 1, and ensuring that the concentricity of the guide post 2 and the tie rod 1 is lengthened.

Further, as shown in Fig. 6, a threaded post 202' is formed on the end surface of the positioning projection 201' of the elongated guide post 2. Accordingly, the bottom surface of the positioning hole 101' of the tie rod 1 is formed with a threaded hole 102' which is threadedly engaged with the threaded post 202'. Further extension of the extension guide can be achieved by threading the threaded post 202' into the threaded bore 102. The connection between the column 2 and the tie rod 1 is rigid.

Advantageously, at least one threaded hole 15 is formed at the outer end of the tie rod 1 at the end corresponding to its positioning hole 101'. Thus, by engaging a suitable screw (not shown) in the threaded hole, the positioning projection of the tie rod 1 can be further positioned, thereby further enhancing the connection rigidity of the elongated guide post 2 and the tie rod 1.

In the embodiment shown in Figures 5 and 6, the mounting of the elongated guide post is simpler than the embodiment shown in Figures 1-3. If the customer needs a longer tie rod 1, the existing extended guide post 2 can be removed from the tie rod 1 and the longer elongated guide post 2 can be replaced. Specifically, the radial screw (not shown) is first removed, and then the extension guide 2 is screwed to release it from the tie rod 1. The new elongated guide post 2 is then mounted to the end of the tie rod 1. The installation of the new longer elongated guide post 2 is the reverse of the above disassembly process. For the embodiment of Figures 5 and 6, the other end of the elongated guide post 2 (i.e., the left end shown in the figure, the opposite end of the end connected to the tie rod 1) is preferably formed with a portion for engaging the wrench (not shown). For example, a protrusion or groove having a polygonal cross section for disassembling and mounting the elongated guide post 2.

In all of the above embodiments, when the tie rod 1 is lengthened, it comprises two parts, that is, a guide section formed by the extension guide post 2 and the end of the tie rod 1 for guiding only without receiving tensile force, and the tie rod 1 The other part constitutes a threaded section for receiving tensile forces. Since the elongated guide post 2 is connected to the end of the tie rod 1 and is positioned by means of the end, the end of the tie rod 1 can also be referred to herein as a positioning section. As described above, the positioning segment does not receive tensile force during operation and is only used to guide the movable die plate 9.

Further, as is apparent from the above description and the drawings, all of the tie bars 1 and the elongated guide posts 2 between the movable die plate 9 and the stationary die plate may have the above structure. Place The connection structure between the (for example, four) tie rods 1 and the elongated guide posts 2 may be the same or different. That is, they may all adopt one of the connection structures shown in FIGS. 1 to 6, or some of the tie rods 1 and the extension guide post 2 may adopt one of the connection structures of FIGS. 1 to 6, and other tie rods 1 and extension guides. The column 2 employs another connection structure as shown in Figs. 1 to 6, which are all within the scope of the invention and the same effects can be obtained.

Further, in the above description, the clamping cylinder shown in FIGS. 1 to 6 is provided with a clamping mechanism on one side of the stationary die plate (where the clamping cylinder pulls the tie rod 1, and the movable die plate 9 is pulled toward the fixed plate by the opening and closing nut 8) The present invention has been described by way of example of a template, thereby applying a clamping force, but the invention is not limited thereto. For example, the principles of the present invention are equally applicable to a clamping mechanism in which the clamping cylinder is disposed on one side of the movable die plate 9 (in this case, the clamping cylinder directly pushes the movable die plate 9). In this case, it is equally possible to detachably connect the elongated guide post to the end of the tie rod which is only used for guiding without being subjected to tensile force. Thus, the connected elongated guide post and the end of the tie rod constitute a guide section for guiding only without receiving tensile force, and the other parts of the drawbar constitute a threaded section that is subjected to tensile force (which may also be a portion that is subjected to tensile force in other manners). Several embodiments of the invention have been set forth above for the purposes of illustration and description. However, the embodiments are all illustrative and are not intended to limit the invention. For example, in the teachings of the present invention, the prior art can realize the detachable connection between the tie rod and the elongated guide post by making the tie rod and the elongated guide post have complementary features of other structures, thereby achieving the purpose of lengthening the tie rod according to customer customization requirements. Without having to disassemble the original lever. The scope of the invention is defined only by the scope of the claims and the equivalents thereof.

1‧‧‧ lever

2‧‧‧Extended guide column

3‧‧‧ Connecting rod

4‧‧‧ nuts

5-7‧‧‧fasteners

8‧‧‧Opening nut

9‧‧‧ moving template

101‧‧‧Positioning bulges

Claims (17)

A two-plate injection molding machine clamping mechanism, the clamping mechanism comprising a movable template, a fixed template and a tie rod connected between the movable template and the fixed template, the movable template can be moved on the pull rod, and its characteristics In that the clamping mechanism further includes a connection structure for detachably connecting the elongated guide post to the end of the tie rod. The two-plate type injection molding machine clamping mechanism according to claim 1, wherein the clamping mechanism further comprises the elongated guide post. The two-plate type injection molding machine clamping mechanism according to claim 1 or 2, wherein the connecting structure comprises: a positioning protrusion formed at an end surface of the end of the tie rod; and formed in the The positioning hole on the end surface of the guide post that cooperates with the positioning protrusion is elongated. The two-plate type injection molding machine clamping mechanism according to claim 3, wherein the connecting structure further comprises: a threaded hole formed on an end surface of the positioning protrusion; a connecting rod, the connecting rod One end threadedly engages the threaded bore and the other end extends through an axial through bore in the elongated guide post; and a fastener that extends the elongated guide post and the other end of the connecting rod The tie rods are fastened together. The two-plate type injection molding machine clamping mechanism according to claim 1 or 2, wherein the connecting structure comprises: a positioning hole formed on an end surface of the end of the tie rod; and forming the lengthening a positioning protrusion in the end surface of the guide post that cooperates with the positioning hole. The two-plate injection molding machine clamping mechanism according to claim 5, wherein the connecting structure further comprises: forming in the a threaded hole in a bottom surface of the positioning hole; a connecting rod having one end threadedly engaged with the threaded hole and the other end extending through an axial through hole in the elongated guide post; and a fastener, the fastener The elongated guide post and the tie rod are fastened together at the other end. The two-plate injection molding machine clamping mechanism according to claim 4, wherein the connecting structure further comprises a nut for further fastening the one end of the connecting rod in the threaded hole. . The two-plate type injection molding machine clamping mechanism according to claim 3, wherein a threaded post is formed on an end surface of the positioning protrusion, and the bottom surface of the positioning hole is formed and Threaded holes threaded by threaded posts. The two-plate type injection molding machine clamping mechanism according to claim 5, wherein a threaded hole is formed in a bottom surface of the positioning hole, and is formed on a positioning protrusion of an end surface of the elongated guide post. There is a threaded post that is threadedly engaged with the threaded bore. The two-plate injection molding machine clamping mechanism according to claim 8, wherein the connecting structure further comprises at least one positioning screw, and the at least one positioning screw is formed on the extended guide post At least one radially through threaded hole on the outer peripheral surface of the positioning hole is engaged to position the positioning protrusion. The two-plate type injection molding machine clamping mechanism according to claim 9, wherein at least one radially threaded hole is formed on an outer peripheral surface of the end of the tie rod corresponding to the positioning hole, The threaded hole engages with a screw to position the positioning projection. The two-plate type injection molding machine clamping mechanism according to claim 1 or 2, wherein the elongated rod comprises at least two sections separable from each other. The two-plate injection molding machine clamping mechanism according to claim 1 or 2, wherein the end portion and the elongated guide post form a guiding portion of the pull rod that is not subjected to tensile force but is only used for guiding . The two-plate type injection molding machine clamping mechanism according to claim 1 or 2, wherein the tie rod further comprises a threaded portion that receives the tensile force. The two-plate type injection molding machine clamping mechanism according to claim 1 or 2, wherein the number of the tie rods is four, and the movable template is provided with the same number of the rods for supporting the support The positioning hole of the tie rod. A two-plate type injection molding machine comprising a two-plate type injection molding machine clamping mechanism according to any one of claims 1 to 15. A two-plate type injection molding machine, comprising: a two-plate type injection molding machine clamping mechanism according to any one of claims 1 to 15, wherein the elongated guide column comprises a plurality of length guides of different lengths column.